stdio-common/psignal.c

   1 /* Copyright (C) 1991, 1992, 1995, 1996, 1997, 2001, 2002, 2004
   2    Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <stdio.h>
  21 #include <signal.h>
  22 #include <stdlib.h>
  23 #include <libintl.h>
  24 #include <wchar.h>
  25
  26
  27 #ifndef HAVE_GNU_LD
  28 #define _sys_siglist    sys_siglist
  29 #endif
  30
  31 /* Defined in sys_siglist.c.  */
  32 extern const char *const _sys_siglist[];
  33 extern const char *const _sys_siglist_internal[] attribute_hidden;
  34
  35
  36 /* Print out on stderr a line consisting of the test in S, a colon, a space,
  37    a message describing the meaning of the signal number SIG and a newline.
  38    If S is NULL or "", the colon and space are omitted.  */
  39 void
  40 psignal (int sig, const char *s)
  41 {
  42   const char *colon, *desc;
  43
  44   if (s == NULL || s == '\0')
  45     s = colon = "";
  46   else
  47     colon = ": ";
  48
  49   if (sig >= 0 && sig < NSIG && (desc = INTUSE(_sys_siglist)[sig]) != NULL)
  50     {
  51       if (_IO_fwide (stderr, 0) > 0)
  52         (void) __fwprintf (stderr, L"%s%s%s\n", s, colon, _(desc));
  53       else
  54         (void) fprintf (stderr, "%s%s%s\n", s, colon, _(desc));
  55     }
  56   else
  57     {
  58       char *buf;
  59
  60       if (__asprintf (&buf, _("%s%sUnknown signal %d\n"), s, colon, sig) < 0)
  61         {
  62           if (_IO_fwide (stderr, 0) > 0)
  63             (void) __fwprintf (stderr, L"%s%s%s\n", s, colon, _("Unknown signal"));
  64           else
  65             (void) fprintf (stderr, "%s%s%s\n", s, colon, _("Unknown signal"));
  66         }
  67       else
  68         {
  69           if (_IO_fwide (stderr, 0) > 0)
  70             (void) __fwprintf (stderr, L"%s",  buf);
  71           else
  72             (void) fputs (buf, stderr);
  73
  74           free (buf);
  75         }
  76     }
  77 }